I don't know, never touched it, but I would suspect that the Service Manual should have that info. Do you have a copy yet?
PDF can be had here,
http://www.valkyrienorway.com/download.htmlThe Valkyrie doesn't have the same kind of quick beam adjustment that the GW had. No air shock to increase/decrease, or the extra weight of a passenger on the back, to change the aim of the head light, then a little turn of the aim dial.
The beam can't be adjusted. Only those 2 dial on the back of the lights to correct the aim. I don't ride nights, so I don't even know where mine are aimed.